Defender Reha (Car Seat mode)

A child car seat with a load-bearing harness made by Thomashilfen, based in the U.S. in Seattle, WA.


A combination child car seat for use up to 65 lbs./29.5 kg in harness mode (like many conventional models) that features many adaptive accessories.   When the child is too heavy or tall to be restrained by the internal 5-point harness, this model can be used as a positional booster seat.  (See Defender Reha in Booster Mode for details about use in that mode.) 

Thomashilfen Defender Reha Car Seat

Last updated on February 1, 2024.

Child Requirements

  Pounds Kilograms Inches Centimeters Age (years)
Minimum 22 10 27 68.6 1 (follow state laws)
Maximum 65 29.5 57 144.8 n/a

Measurements and Characteristics

Car Seat Mass (Weight)

22 lbs./10 kg

Vehicle Fit Characteristics

Outside height—minimum:
Outside height—maximum:
26.5 in./67.3 cm
33.5 in./85 cm
  Widest outside width: 18.25 in./46.3 cm
  Vehicle requirements:
  • Standard vehicle attachment (seat belt or LATCH).
  • Tether anchor highly recommended

Child Fit Characteristics

  Narrowest torso area: 6.5 inch/ 16.5 cm
  Narrowest seat cushion width: 8.5 in./21.5 cm
  Seat cushion depth: 13.5 in./33 cm
  Seat cushion depth extender options: No

Harness Fit Characteristics

  Harness Type: Five-point
  Number of harness height positions: 9
  CR bight to lowest shoulder height position: 10 in./25 cm
  CR bight to highest shoulder height position: 19.5 in./49.5 cm
  Crotch strap present: Yes
  Crotch strap adjustability: Yes, two positions
  CR bight to nearest crotch strap position: 5.5 in./14 cm
  CR bight to farthest crotch strap position: 8.0 in./20.3 cm


  Semi-recline allowed in forward-facing position: Yes; 10° recline with seat wedge underneath (accessory, described below)
  Other: CR seatback can be adjusted to recline to match angle of vehicle seatback


  Tether present: Yes, LATCH
  Special tethering: No

Accessories / Add-ons

Standard accessories:

  • lateral seat support
  • lateral trunk support
  • head support
  • small soft crotch pad
  • chest clip
  • shoulder strap pads
  • cup holder

Add-on accessories:

  • Footrest with adaptor and footrest pad (adjustable angle; short is 4.7 in./12 cm and long is 7.1 in./18 cm)
  • Table (soft play tray that provides body support and limits access to the buckle)
  • Abduction block (soft crotch pommel)
  • Seat wedge (provides 10° angle of recline)
  • Crotch strap extender (for use when transitioning this model to booster mode)

Miscellaneous Information

  • MSRP (U.S. dollars): $945.00
  • Company certifies to meet standard:
    • FMVSS213 (U.S.): Yes
    • CMVSS 213 (Canadian): Yes
  • Will ship to Canada? Yes
  • Owner’s manual languages available: English, French

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